If there is no damage to the hardware, the maximum torque output of the inverter is generally less than the load to increase the torque. The acceleration time is too short ...

The essence of energy feedback is active inverter, and the realization method of energy feedback of general inverter is to feed renewable energy to the grid with an anti-parallel three-phase inverter at the uncontrolled rectification of the pre-stage of the general inverter. The main circuit of the energy feedback equipment is mainly composed of thyristors, IGBTs and IPM modules.

The types of production machinery are complex, the functional and process requirements are different, and the torque characteristics are also different, therefore, before the application of the inverter, the first thing is to understand the nature of the load carried by the motor, that is, the load characteristics, and then select the inverter and the motor. There are three types of loads: ...

1. What does open-loop mean in the use of inverters? The speed detector (PG) is installed on the motor equipment in operation, and the speed response of the actual speed is sent to the control equipment, which is called "closed loop", and the speed detector that does not use PG is called "open loop". Most general-purpose drives are open-loop ...

First, the inverter is not repaired and the power test is tested (1) Inverter repair test rectifier circuit At the two ends of the inverter to detect the internal DC power supply, P and N ends, adjust the multimeter to the resistance RX10 gear, the red watch pen is connected to the P end, and the black watch pen is connected to R, S, T in turn.

Capacitor damage is the highest problem in electronic devices, especially electrolytic capacitors. Capacitor damage is manifested in: 1. Capacity becomes smaller, 2. Capacity is completely lost, 3. Leakage, 4. Short circuit. Electricity...

(1). The deceleration time of the frequency conversion parameter is increased or free parking is adopted Assuming that the overpressure phenomenon is present in the parking process, the process has no parking requirements for the parking time or direction, and the deceleration time can be increased appropriately. The reason for the overvoltage in the parking process is that after the frequency conversion announces the deceleration command, the motor ...

(1) Rectifier. As one of the most important components of the inverter, the rectifier can convert the AC power into direct current. Its working method is more common to that of a battery charger or arc welder. It uses a diode bridge to limit the communication sine wave to only one direction.

Most of the damage of the inverter module is due to the damage of the driving electric, which causes the two switching devices on one bridge arm to be turned on at the same time. Inverter inverter power module damage is a common problem in other inverter equipment such as vector inverter or energy-saving inverter.

1. Control method: i.e. speed control, rotation control, PID control, or other methods. After the control method is adopted, it is generally necessary to carry out static or dynamic identification according to the control accuracy. 2. Minimum operating frequency: That is, the minimum speed of the motor operation, the motor at low speed ...

1. Why can the rotation speed of the motor be changed freely? The unit of motor rotation speed: r/min the number of rotations per minute, can also be expressed as rpm. Example: 2-pole motor 50Hz3000 [r/min] 4-pole motor 50Hz1500[r/min] Conclusion: The rotation of the motor ...

The presentation of inverters has brought a revolution to industrial automation control and motor energy saving. Industrial production is simply inseparable from the inverter, even in the daily livelihood, elevators, inverter air conditioning has become a part of the insistence, inverter from the beginning into all corners of production, subsistence. However...

1. Phase alignment method of incremental encoder The alignment between the phase of the UVW electronic transmutation signal and the phase of the rotor pole, or the phase of the TV spot, of the incremental encoder with the signal exchange is as follows: 1) Use a DC power supply to pass the UV winding of the motor to less than the amount of ...

1. Cooling fan As a prerequisite to ensure the normal operation of the inverter, efficient and fast in-line cooling fans have become an indispensable conversion configuration of the inverter. Because of the wear of the internal bearings of the cooling fan and the reduction of the grease function in the process of application, the cooling of the fan.

1. The capacitance is generally indicated by "C" plus a number in the circuit (e.g., C25 indicates the capacitance numbered 25). A capacitor is a component composed of two metal films close to each other and separated by an insulating material in the center. The characteristic of the capacitor is first and foremost the communication through the DC block. The size of the capacitance is ...

In the process of repairing the inverter, we can find that because of the back electromotive force in the stator winding, the electromotive force in the synchronous generator state and the self-induced electromotive force in the self-loop rotor, the current impact will inevitably have a negative impact on the motor, the inverter (Variable-frequency ...

1. Mechanical speed regulation form There are three methods of mechanical speed regulation: electromagnetic clutch, hydraulic coupling, and viscous clutch. Among them, the hydraulic coupling device is widely used, that is, a hydraulic coupling device is connected in series between the motor and the load, and the concave and convex liquid level is used to adjust the hydraulic coupling between the motor and the load.

In the process of using bearings, often due to some external factors cause some wear in the rotation of the bearing, and these bearing wear will be completely damaged in the addition of day by day, which requires our maintenance personnel to replace the bearing, and generally form a bearing.

1. Discrimination The inverter power module mainly includes IGBT, IPM, etc., check whether the appearance has exploded, and whether there are ablation marks between the terminal and the connected printed board. Use a multimeter to check whether C-E, G-C, G-E have been passed, or use a multimeter to measure whether the resistance of P to U, V, W and N to U, V, W is inadequate.

The so-called "hum" sound, that is caused by the frequency of the inverter's output waveform carrier, generally if the inverter you use is a fixed carrier, at the moment the motor is screaming, the human ear is more stimulated, then you can adjust the carrier frequency (inverter skills manual function table ...

Prior to the introduction of frequency converters, overhead crane operators operated the cranes using contactor-based controls. For low-cycle cranes, the system is equipped with a single or two-speed motor. For cranes with higher load cycles, they use so-called wound rotor motors. ...